Originally Posted by sivadselim
They can't, which is why I added the caveat "assuming AVRs could be configured as such"
Ah, I wasn't sure. Never bothered to test it.
What if you could add a 3rd speaker to the front two you already chose? Would you add a center speaker or a single surround (again, assuming an AVR could be configured for it)? Just curious.
Probably go with a 3.0/3.1. Any configuration with a single surround, the surround would have to be directly behind you, wouldn't it? Considering our ears are more front biased in regards to listening, I just don't know how much I could get out of a single rear speaker. Maybe if the rear was a dipole or something with more dispersion, but I'd have to hear it first.
5.1/7.1 setups at least put the speakers more to the sides, and I have heard some distinction from my rear surrounds in regards to panning effects back there. Not very often, but it does occur.